Investigation of prestressed reinforced concrete for highwa-y bridges : seventeenth progress report / prepared as a par-t of an investigation conduced by the Engineering Experimen-t Station University of Illinois ; in cooperation with the -Division of Highways State of Illinois and U.S. Department -of Transportation Federal Highway Administration Bureau of -Public Roads. 

 - Urbana, Ill. : University of Illinois 
 - [112]p. 
 - Progress report ; no. 17 .